* add enum baudrates
fixes perceived limitation of available baud rates https://github.com/Microsoft/pxt/issues/1752
* correct block comment
* comma correction and remove trailing space
That will teach me just to do cut and paste via github web interface :(
* without running pxt buildtarget
* aligning uart apis with serial
* reorganizing serial/bluetooth blocks
* Autoupdate configuration for UART. (#279)
* Autoupdate configuration for UART.
* removing serial autoupdates.